Black Coffee Calories: Black coffee is often touted as a popular beverage for weight loss. It is a calorie-free drink that can potentially boost metabolism and increase fat burning. The caffeine in black coffee acts as a stimulant, providing an energy boost and suppressing appetite temporarily. It may also enhance physical performance during workouts, allowing for more intense calorie burning. Black coffee contains antioxidants that may have health benefits, such as reducing inflammation and improving insulin sensitivity. However, it's important to note that excessive consumption of black coffee can lead to negative effects like insomnia, increased heart rate, and digestive issues. It is best to consume it in moderation as part of a balanced diet and active lifestyle.